Conocyathus d'Orbigny 1849

Conocyathus d'Orbigny, 1849

Conocyathus d'Orbigny, 1849:5.—Milne Edwards and Haime, 1851:20.—Vaughan and Wells, 1943:210.—Alloiteau, 1952:646.—Wells, 1956:F425.—Chevalier, 1987:747–748.—Filkorn, 1994:49–50.

Stylocyathus Reuss, 1856:266.—Not d'Orbigny, 1849:4.

Pleurocyathus Kefferstein, 1859:364.

Not Madrepora (Conocyathus) Brook, 1893:160 [= Acropora].

?Conocyathus (Chingchingocyathus) Ogbe, 1976:2.

DIAGNOSIS.—Corallum conical, with rounded base and calice circular to slightly elliptical in cross section; coralla small, largest known specimen only 3.4 mm in CD. Costae corresponding to septa independent in origin and very finely granular, giving the appearance of being smooth. Additional cycle of equal-sized intercostae also present (c:s = 2). Unilinear series of deep thecal pits in each costal/intercostal region (Plate 8b), but only in worn specimens do these pits completely penetrate theca. Septa hexamerally arranged in 3 cycles. One crown of 6 styliform or lamellar pali (P2) occurs before S2. Columella rudimentary to absent.